This is about when a lot of people are going to tell you not to buy from performance and to get professionally fit.
The bike is not full ultegra - rear cassette isn't, the cranks aren't, the brakes aren't, wheels aren't. The pieces they have on it instead of ultegra aren't bad - and seriously, brakes are brakes. Ultegra ones really don't stop any better than the other ones - it's a huge lawsuit if your brakes don't work.
19 lbs isn't too shoddy, however.
My titanium bike is 16-18 lbs with an ultegra double, my carbon bike is 18-20 lbs with a 105 triple. Truthfully? I can't tell the difference between ultegra & 105, the former is lighter, but I can't feel the difference at all in shifting. So I don't think I would discount a 105 level bike if I were you. I recently had the opportunity to upgrade my carbon bike to ultegra for a few hundred and I didn't bother because it really wasn't necessary. But you may be able to tell the difference.
I know Becky just recently bought a carbon fuji bike, I don't remember the model - but if you look up her posts, you can find some comments.